JP2001343180A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent foods from drying and rapidly cool them for preventing temperature rise in a refrigerator when they are put therein. SOLUTION: A cold air duct composed of an inner box wall and a heat insulating box is provided along the ceiling, back surface and side surfaces of the refrigerator and a flow switching louver switched by the opening and closing of the door is formed inside the duct, so that the louver is switched to circulate cold air within the duct alone to keep the refrigerator at a constant temperature and high humidity through entire inner wall surface cooling when the door is closed, while the louver is switched to circulate the cold air in the refrigerator for radiation cooling and therefore prevent temperature rise in the refrigerator when the door is opened to put the foods therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a refrigerator provided with an evaporator and a cooling fan.

[0002]

2. Description of the Related Art Generally, a refrigerator has a refrigeration cycle in which refrigerant discharged from a compressor passes through a condenser, a throttle valve, and an evaporator, and returns to the compressor again. Cooling system (direct cooling type), and cooling system (inter-cooling type) in which cool air cooled by an evaporator is supplied into a refrigerator by a cooling fan and cooled.

[0003]

In the case of a cooling type (hereinafter referred to as a fan-cooling type) in which the inside of a refrigerator is cooled by blowing cold air cooled by an evaporator, the amount of cool air is reduced when rapid cooling is required. Although the cooling time can be shortened by increasing the amount, the cold air comes into direct contact with the food for a long time, which results in drying of the food, which is not preferable in food preservation.

On the other hand, in the radiant cooling by the direct cooling type (hereinafter referred to as a wall cooling type), high humidity and high temperature in the refrigerator can be obtained, and the cold air does not directly hit the food as in the fan cool type. Although suitable for storage, there is a problem that condensation on the wall surface (with dew) and rapid cooling required under high load become slow.

Accordingly, the present invention provides a refrigerator that prevents the inside temperature from becoming high immediately after the food is input or by frequent opening and closing of the doors, aims to improve the preservability of the rapidly cooled food, and takes into consideration the dew on the wall surface and the preservation food. With the goal.

[0006]

According to a first aspect of the present invention, there is provided a refrigerating room comprising a heat-insulating box, wherein an opening / closing door having a storage portion such as a door pocket is provided.
In a refrigerator in which an evaporator and a cooling fan are arranged,
A cool air duct through which cool air flows along the inner box wall surface is provided between the inner box and the outer box of the heat insulating box constituting the refrigerator compartment, and the plurality of wall surfaces of the inner box serve as cooling surfaces. Further, a cool air flow path switching louver for switching a cool air blowing direction is provided, and a detecting means for detecting an open / close state of the open / close door is further provided.

Thus, when the door is closed and the temperature inside the refrigerator is stable, the switching louver is switched to the cool air duct side to circulate cool air along the inner box wall surface, and the high temperature by wall cooling suitable for food storage is achieved. Perform cooling storage under high humidity conditions. on the other hand,
When the door opens and the temperature inside the refrigerator must be lowered immediately, such as when feeding food, the switching louver is switched to the inside of the refrigerator to circulate cool air through the space inside the refrigerator, and the air curtain blows cool air from above. As a result, the inside of the refrigerator is quickly cooled by suppressing the inflow of outside air.

According to a second aspect of the present invention, an evaporator through which a refrigerant discharged from a compressor flows and a cooling fan circulating cool air are arranged on a back surface of a refrigerator compartment box partitioned by a heat insulating partition wall. A first cold air duct that circulates cool air along the inner box back wall and the ceiling wall from the inner box rear side to the ceiling side is provided, and cool air from the first duct is provided on both sides of the inner box on both sides of the inner box. A second cool air duct that circulates cool air along the wall surface, a plurality of wall surfaces of the inner box are configured as cooling surfaces, and a cool air flow path is formed in a ceiling of the first cool air duct; A switching louver is provided to switch between the side and the refrigerator compartment space side.

With this configuration, when circulating cool air through the interior space, the cool air can be circulated from the ceiling of the first cool air duct, and the interior space can be uniformly cooled.

According to a third aspect of the present invention, in the second aspect, when the door is closed, the opening of the second cool air duct provided with the flow path switching louver communicates with the door cooling duct provided on the door surface. I do.

[0011] With this configuration, radiant cooling from the door surface is also possible, and the freshness preservability can be further improved because the entire wall surface of the refrigerator compartment becomes a cooling surface.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be specifically described with reference to FIGS. FIG. 1 is a sectional view of a refrigerator showing a first embodiment of the present invention, wherein (a) is a side view and (b) is a front view. FIG. 2 is an enlarged view of the vicinity of the switching louver arranged in the ceiling duct in the warehouse (a).
However, when cooling the wall, which circulates cool air along the wall of the inner box,
(B) shows the louver position at the time of fan cool cooling in which cool air is circulated in the internal space. FIG. 3 shows a refrigeration cycle in which the refrigerant flow path is switched by a three-way valve and cooling room cooling and freezing room cooling are alternately repeated.

In FIG. 1, reference numeral 1 denotes a refrigerator main body, which is formed of a heat insulating box in which a heat insulating material 40 is filled between an inner box 2 and an outer box 3. The interior of the refrigerator 1 is divided into a refrigeration temperature zone (refrigeration room, vegetable room) 4 and a freezing temperature zone (freezing room) 5, and a refrigeration storage room 6, a vegetable room 7, a first freezing room 8,
A second freezing compartment 9 is provided, and the front surface of each compartment has opening / closing doors 10 to 13, respectively.

The interior of the refrigerator compartment 4 is divided into a refrigerator compartment 6 and a vegetable compartment 7 by a refrigerator partition plate 14. Freezer compartment 5
Is partitioned into a first freezing compartment 8 and a second freezing compartment 9 by a freezing partition plate 15, and the vegetable compartment 7 and the first freezing compartment 8 are partitioned by a heat insulating partition wall 16 having the same configuration as the heat insulating box. The cool air in the refrigerator compartment 4 and the cool air in the freezer compartment 5 are completely independent of each other.

On the other hand, the freezing compartment evaporator 17 and the freezing compartment cooling fan 18 are arranged on the back walls of the first and second freezing compartments 8 and 9,
By circulating cool air, the first and second freezer compartments 8 and 9 are cooled.

As shown in FIG. 3, a compressor 20 and a condenser 21 constituting a refrigeration cycle are arranged in a machine room 19 at a lower portion of a back wall of the refrigerator main body 1, and refrigerant discharged from the compressor 20 is provided. After passing through the condenser 21, the three-way valve 22
The refrigerant switching mechanism alternately switches the refrigerant flow path between the refrigerating room evaporator 25 side and the freezing room evaporator 17 side. Then, the pressure is reduced by the refrigerated capillary 23 or the frozen capillary 24, enters the refrigerated room evaporator 25 or the refrigerated room evaporator 17, and is cooled at the respective evaporating temperatures.
The refrigeration cycle is configured to return to.

According to the refrigerator 1 having such a configuration, the refrigerant flows to the refrigerator compartment evaporator 25 or the freezer compartment evaporator 17 by the operation of the compressor 20, and the inside of the refrigerator is cooled. That is, in the freezing temperature zone 5, the freezing room cooling fan 18
Cold air is circulated in the refrigerator by the first and second freezer compartments 8,
9 is performed.

On the side of the refrigeration temperature zone 4, from the back side of the inner box 2 to the ceiling side, a first cool air duct 26 for circulating cool air along the back wall surface and the ceiling wall surface of the inner box 2; The second cool air duct 27 which circulates cool air from the first duct 26 along both side wall surfaces of the inner box 2 on both side surfaces of the second cool air duct 2, and the cool air which circulates through the second cool air duct 27 is again supplied to the refrigerator compartment evaporator 25 side. A cool air duct is constituted by the return duct 28 configured to flow to the inside, and the cool air in the duct passes through the back, the ceiling, both side surfaces, and the bottom surface of the refrigerated storage room 6 and the vegetable room 7, and flows again through the back surface, thereby forming an inside. Cooling is possible on all walls of the box.

Cold room evaporator 25 and cold room cooling fan 29
Is disposed above the rear side of the inner box 2 of the first duct 26, and is further provided on the side of the opening / closing door 10 on the ceiling side of the inner box 2 of the first duct 26 with a flow path switching louver 31 controlled by driving a motor 30. Is arranged. The first duct 26 upstream of the flow path switching louver 31 is provided with an in-compartment air outlet 32 communicating with the inside of the refrigerator storage chamber 6, and the downstream side of the flow path switching louver 31 is provided through a side communication port 33. It communicates with the second ducts 27 provided on both side surfaces of the refrigerated storage room 6.

Hereinafter, the structure of the switching louver 31 will be described. FIGS. 4 and 5 are perspective views of the ceiling duct 26, and show the flow of cool air with the heat insulating portion of the ceiling and the opening and closing door 10 removed.

The channel switching louver 31 is rotated by the drive motor 30, and when the wall is cooled, the channel switching louver 31 becomes a part of the wall of the first duct 26 as shown in FIGS. It stops at the position where the outlet 32 is closed.
After passing through the flow path switching louver 31, the cool air passes through the second duct 2 through the side communication ports 33 provided on both sides of the first duct 26.
7. The cool air flowing down the second duct 27 enters the vegetable compartment 7, flows through the gap between the vegetable compartment container 34 and the inner box wall surface, and is sucked from the lower end 28 a of the return duct 28.

On the other hand, at the time of fan cooling, as shown in FIG. 2B and FIG. 5, the flow path switching louver 30 shuts off the cold air flow path flowing to the second duct 27 so that the inside air outlet 32
To release. The cool air is blown downward as an air curtain from the inside outlet 32 and circulates from the upper door side in the store. Therefore, the cool air can be circulated uniformly without being blocked by the shelf in the refrigerator. A part of the cool air enters the vegetable compartment 7 through the opening 14a provided in the refrigerated partition plate 14, and is sucked in from the lower end 28a of the return duct 28 as in the case of cooling the wall. The cool air after the cooling in the refrigerated storage room 6 returns from the cool air suction port 28b opened in the rear duct 28 in the refrigerated storage room 6.

An open door detection switch 35 for detecting the opening and closing of the door is attached to the open / close door 10 side of the refrigerated storage room 6. The operation is performed to cool the wall surface when the door is closed and to cool the fan when the door is open. Is switched.

Thus, when the door is closed, the flow path switching louver 31 shuts off the internal outlet 32,
The cool air sent to the duct 26 is, as shown in FIG.
Is supplied to the second duct 27. Then, the cold air cooled by the refrigerator compartment evaporator 25 is sent to the first duct 26 by the operation of the refrigerator compartment cooling fan 18. The cool air flows from the first duct 26 to the second duct 27, and cools the wall surface of the refrigerated storage room 6, whereby the inside of the refrigerator is cooled by radiation. Therefore, the circulating cool air is shut off from the inside of the refrigerator, and the refrigerator becomes a windless state. As a result, wall cooling is performed, and cooling can be performed in a constant-temperature and high-humidity state suitable for food preservation, so that cold air does not directly hit the food, thereby suppressing the drying of the food. In order to equalize the wall surface temperature during wall cooling, the number of revolutions of the refrigerator compartment cooling fan 29 is increased as compared with fan cooling,
It is necessary to increase the circulation air volume.

When the opening / closing door 10 is opened, for example, at the time of feeding a food, the door opening detection switch 35 detects the opening of the door, controls the flow path switching louver 31, and opens the inside outlet 32.
Thereby, the cold air flow path to the second duct 27 is shut off,
The cool air is blown out to each part (each shelf) in the refrigerator as an air curtain from above to the refrigerated storage room 6. After cooling the inside of the refrigerator, the cool air suction port 28 provided in the return duct 28 is provided.
b enters the return duct 28. In the vegetable room 7, a part of the cold air in the refrigerated storage room 6 enters the vegetable room 7 through the opening 14a provided in a part of the refrigerated partition plate 14, cools the vegetable room container 34 from the outside, and returns. The lower end 28a of the duct 28 is guided into the return duct 28 and merges with the return cold air from the refrigerated storage room 6, and is again returned to the refrigerated room evaporator 25.
Cooled by.

With this structure, when the door is opened, the air curtain from which the cool air blows out from above suppresses the inflow of outside air, and also allows each shelf in the refrigerator to be uniformly cooled, thereby suppressing a rise in the temperature in the refrigerator. .

FIG. 6 is a sectional view of a refrigerator showing another embodiment. FIG. 5 shows a case where a duct is provided on the door surface,
In this configuration, the cool air after one passage is distributed to the side duct 27 and the door duct 36 to cool five wall surfaces. In this case, 4
Higher humidity and constant temperature can be obtained than at the time of wall cooling, and food preservability can be improved.

[0028]

As described above, according to the refrigerator of the present invention, it is possible to switch between wall cooling and fan cooling, so that during normal operation, high humidity and constant temperature can be obtained without wind by the wall cooling, and Even if the door is opened at the time of putting food in, the cool air blown out from above will act as an air curtain to suppress the inflow of outside air and can cool each part in the refrigerator evenly. The rise can be prevented. In addition, by forming a duct in the opening and closing door and circulating cool air in the door duct during normal operation, it is possible to cool the wall surface by all the walls of the refrigerated storage room, and it is possible to control to a higher humidity and constant temperature .

[Brief description of the drawings]

FIG. 1 (a) is a side sectional view of a refrigerator showing a first embodiment of the present invention. (B) It is a front sectional view of the refrigerator which shows a 1st embodiment of the present invention.

FIG. 2 (a) is an enlarged side view of the vicinity of a flow path switching louver according to the present invention when cooling a wall surface. (B) It is an enlarged side view at the time of fan cool cooling of the vicinity of the flow path switching louver in the present invention.

FIG. 3 is a refrigeration cycle diagram of a refrigerator.

FIG. 4 is a perspective view of the vicinity of the flow path switching louver in cooling the wall surface according to the present invention.

FIG. 5 is a perspective view of the vicinity of the flow path switching louver in cooling the fan according to the present invention.

FIG. 6 is a side sectional view of a refrigerator according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator main body 2 Inner box 3 Outer box 4 Refrigeration temperature zone 5 Freezing temperature zone 6 Refrigerated storage room 7 Vegetable room 8 First freezing room 9 Second freezing room 10-13 Door 14 Refrigeration partition 1 Freezing partition 2 Insulated partition 3 Freezer Evaporator 4 Freezer Cooling Fan 5 Machine Room 6 Compressor 7 Condenser 8 Three-Way Valve 9 Refrigerated Capillary 10 Refrigerated Capillary 11 Refrigerator Evaporator 12 Ceiling Duct 13 Side Duct 14 Back Duct 15 Cold Room Cooling Fan 16 Motor 17 Channel switching louver 18 Inside outlet 19 Side communication port 20 Vegetable room container 21 Door open / close detection device 22 Door duct

Claims (3)

[Claims] 1. A refrigerator in which an opening / closing door provided with a storage portion such as a door pocket, an evaporator and a cooling fan are arranged in a refrigerator compartment formed of a heat insulating box, wherein the refrigerator compartment is formed. Providing a cool air duct that circulates cool air along the box wall surface, and configuring the plurality of wall surfaces of the inner box as cooling surfaces,
An internal outlet for circulating cold air in the internal space of the refrigerator compartment,
A switching louver for switching a flow path of the cold air between the cold air duct side and the inside air outlet side, and a detection unit for detecting an open / closed state of the opening / closing door, wherein the switching louver is closed when the detection unit detects the opening of the door. A refrigerator, wherein the refrigerator is switched to an inner air outlet side to circulate cool air into the interior space of the refrigerator, and when a door is closed, the switching louver is switched to a cool air duct side to circulate cool air along the inner box wall surface. 2. An evaporator through which a refrigerant discharged from a compressor flows and a cooling fan circulating cool air are arranged on the rear side of the refrigerator compartment box partitioned by a heat insulating partition wall, respectively. A first cold air duct that circulates cool air along the inner box back wall surface and the ceiling wall surface is provided on the side of the ceiling, and on both sides of the inner box, cool air from the first duct is provided on both sides of the inner box. A second cool air duct that circulates cool air along the second cool air duct, wherein a plurality of wall surfaces of the inner box are configured as cooling surfaces, and a cool air flow path is provided on a ceiling of the first cool air duct; A refrigerator provided with a switching louver for switching between a refrigerator side and a refrigerator room space side. 3. A door cooling duct through which cool air flows is provided between an inner wall surface of an opening / closing door having a storage portion such as a door pocket and a back surface of the storage portion, and the switching louver is switched to a second cool air duct side. 3. The method according to claim 2, wherein the second cool air duct and the door cooling duct communicate with each other to form a circulation path for circulating cool air along the inner box wall surface of the refrigerator and the inner wall surface of the door. Refrigerator.